php时间函数用法分析，php函数用法
php时间函数用法分析，php函数用法
本文实例讲述了php时间函数用法。分享给大家供大家参考，具体如下：
php中有unix时间戳的 相关操作函数，使用很方便
time() 返回当前的 Unix 时间戳
microtime -- 返回当前 Unix 时间戳和微秒数
例 1. 用 microtime() 对脚本的运行计时
<?php
/**
* Simple function to replicate PHP 5 behaviour
*/
function microtime_float()
{
list($usec, $sec) = explode(" ", microtime());
return ((float)$usec + (float)$sec);
}
$time_start = microtime_float();
// Sleep for a while
usleep(100);
$time_end = microtime_float();
$time = $time_end - $time_start;
echo "Did nothing in $time seconds/n";
?>
mktime()取得一个日期的 Unix 时间戳
int mktime ( [int hour [, int minute [, int second [, int month [, int day [, int year [, int is_dst]]]]]]] )
参数可以从右向左省略，任何省略的参数会被设置成本地日期和时间的当前值
date()格式化一个本地时间／日期
string date ( string format [, int timestamp] )
提示: 自 PHP 5.1 起在 $_SERVER['REQUEST_TIME'] 中保存了发起该请求时刻的时间戳。
strtotime -- 将任何英文文本的日期时间描述解析为 Unix 时间戳
echo strtotime("+1 day"), "/n";
echo strtotime("+1 week"), "/n";
例2. 某个时间的后一天，后一月
strtotime("+1 day ".$day);
strtotime("2008-01-31 +1 month");
strtotime($day." +1 day");
以上形式都正确
PS:本站还提供了一个Unix时间戳转换工具，非常实用，提供给大家参考：
Unix时间戳(timestamp)转换工具：
http://tools.jb51.net/code/unixtime
这里再为大家推荐一款本站的php格式化美化的排版工具，帮助大家在以后的PHP程序设计中进行代码排版：
php代码在线格式化美化工具：
http://tools.jb51.net/code/phpformat
另外，由于php属于C语言风格，因此下面这款工具同样可以实现php代码的格式化：
C语言风格/HTML/CSS/json代码格式化美化工具：
http://tools.jb51.net/code/ccode_html_css_json
更多关于PHP相关内容感兴趣的读者可查看本站专题：《PHP数学运算技巧总结》、《php操作office文档技巧总结(包括word,excel,access,ppt)》、《PHP数组(Array)操作技巧大全》、《php排序算法总结》、《PHP常用遍历算法与技巧总结》、《PHP数据结构与算法教程》、《php程序设计算法总结》、《php正则表达式用法总结》、《PHP运算与运算符用法总结》、《php字符串(string)用法总结》及《php常见数据库操作技巧汇总》
希望本文所述对大家PHP程序设计有所帮助。
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